<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<div id="app">
  <input v-model="message" type="text" >{{message}}
</div>
<script src="../js/vue.js"></script>
<script>
  const vm=new Vue({
    el:'#app',
    data:{
      message:'你好啊'
    }
  })
</script>

</body>
</html>